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73 Magazine (October 1979)

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73 Magazine (October 1979)


Published October 1979
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73 Magazine October 1979 (#229)

Extremely Low Frequency Radiation: Cause for Worry? - studies on ELF are inconclusive, but the battle is joined ...... WB2NEL 34
An LED Display for the HW-2036 - eliminates unwieldy thumbwheel switches ...... WA4BZP 36
It's a Wattmeter... It's an Swr Bridge.. It's Swattmeter! - a super home-brew project ...... K4LBY 42
The Double-Sawbuck QRM Annihilator - 3-IC circuit yields perfect CW ...... WA5QAP 50
Center Insulator for your Next Antenna - do it yourself with PVC ...... AC5P 52
Another Approach to Repeater Control - uses 7516 chip for low parts count ...... W7JSW 54
Yes, You Can Build this Synthesizer! - keep your crystal rig ...... WB2BWJ 58
Analog Telemetry Techniques - while designed for medical signals, these circuits work with any analog data ...... K4IPV 68
The MICROSIZER: Computerized Frequency Control - a synthesized vfo replacement for most HF rigs ...... N4ES, W4BF 74
CW Fans: Give Superior Selectivity to your Atlas Rig - this mod uses an inexpensive MFJ filter ...... WB9WWM 90
A Sensible CMOS TT Decoder - presented by popular demand ...... N6WA 98
DTMFR for your Repeater - state-of-the-art TT decoding ...... K4ALS 102
Freedom Fighters on Forty - SWLing the anti-Castro clandestines ...... KA5M 108
The Miserly Mobile PVC Special - radiates a very economical signal ...... AA4RH 112
FSK Fix for the 820S - the RTTY relay remedy ...... W1PN 114
Einstein Was Wrong! - this story has a Mobius twist ...... Phenix 116
An 8-Bit DPDT Digital Switch - many uses ...... W1SNN 130
Get a Piece of The Rock - a DXpedition to Gibraltar ...... W9JVF/ZB2CS 136
Easy-to-Build 220 Transverter - simple hookup to any synthesized 2m rig ...... WA7SPR 142

Index courtesy of http://www.qsl.net/kb9mwr/files/ham/73.html.A


Year 1979
Language English
Collection 73-magazine; magazine_rack; additional_collections

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